diff --git a/CHANGELOG.md b/CHANGELOG.md
index dd76fea..3d2eaae 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+- Prepared pipenv virtual environment.
 
 ## [0.3] - 2020-03-23